Although competition season has not started yet, I want to get familiar with the topics in Chemistry lab(I am a freshman with no chemistry background). Where can I learn the concepts relating to this event from the basics?

Although competition season has not started yet, I want to get familiar with the topics in Chemistry lab(I am a freshman with no chemistry background). Where can I learn the concepts relating to this event from the basics?

For basics, I'd recommend a general chemistry textbook such as Zumdahl.